need ip6_var before in_pcb.h or in6_pcb.h (do we really need in_pcb.h here?)
need ip6_var before in_pcb.h or in6_pcb.h
(do we really need in_pcb.h here?)

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame